This problem is not reproducible if XKB is disabled. The cause of the problem is
that Xserver treats the key event consumed by Xevie client as a repeat key and
send an addtional KeyPress event to Xevie client
derek dot wang at sun.com 2004-08-26


Xext/xevie.c:
*** 464,469 ****
--- 464,476 ----
          xE->u.keyButtonPointer.state = keyc->state;
          /* fix bug: sequence lost in Xlib */
          xE->u.u.sequenceNumber = clients[xevieClientIndex]->sequence;
+       /* fix for bug5092586 */
+       if(!noXkbExtension) {
+           switch(xE->u.u.type) {
+           case KeyPress: *kptr |= bit; break;
+           case KeyRelease: *kptr &= ~bit; break;
+         }
+       }
          sendEvent(clients[xevieClientIndex], xE);
          return;
      }